11391028028 has 12 divisors (see below), whose sum is σ = 19939123512. Its totient is φ = 5694135600.

The previous prime is 11391028013. The next prime is 11391028043. The reversal of 11391028028 is 82082019311.

It is an interprime number because it is at equal distance from previous prime (11391028013) and next prime (11391028043).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325898 + ... + 359153.

It is an arithmetic number, because the mean of its divisors is an integer number (1661593626).

Almost surely, 2^11391028028 is an apocalyptic number.

It is an amenable number.

11391028028 is a deficient number, since it is larger than the sum of its proper divisors (8548095484).

11391028028 is a wasteful number, since it uses less digits than its factorization.

11391028028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689212 (or 689210 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 11391028028 in words is "eleven billion, three hundred ninety-one million, twenty-eight thousand, twenty-eight".